Display a a related entity property value as a form label in symfony -

this stems question question has changed slightly: odd many-to-many form rendering symfony , doctrine

my entities formula one-to-many formulacolor many-to-one color.

formula (id, code, name) formulacolor (formula_id, color_id, percentage) color (id, code, name)

a formula can have 1 or more colors , each color makes percentage of formula.

i'm trying make formula edit type show percentage fields given formula , label or title each percentage field color->name label. showing percentage fields formula, want label each 1 color name. how can this? have somehow use querybuilder?

i have formulaaddedittype looks this:

public function buildform(formbuilderinterface $builder, array $options) {     $builder         ->add('code', null, array(                 'label' => 'code'             ))         ->add('name', null, array(                 'label' => 'name'             ));      $builder->add('formulacolors', 'collection', array(             'type' => new formulacolortype(),             'allow_add' => true,             'allow_delete' => true,             'prototype' => true,         )); } 

then formulacolortype:

public function buildform(formbuilderinterface $builder, array $options) {     $builder->add('percentage', 'number', array(             'label' => new coloraddedittype()         )); } 

coloraddedittype

public function buildform(formbuilderinterface $builder, array $options) {     $builder         ->add('code', null, array(                 'label' => 'code'             ))         ->add('name', null, array(                 'label' => 'name'             ))     ; } 

the controller action

/**  * @route("/formulas/{id}/edit")  * @method({"get", "post"})  * @template()  */ public function editaction(request $request, $id) {     $em = $this->getdoctrine()->getmanager();      $formula = $em->getrepository('prismportalcommonbundle:formula')->find($id);      if (!$formula) {         throw $this->createnotfoundexception('unable find formula entity.');     }      $form = $this->createform(new formulaaddedittype(), $formula);      if ($request->ismethod('post')) {         $form->bind($request);          if ($form->isvalid()) {              $em->persist($formula);             $em->flush();              return $this->redirect($this->generateurl('prism_portal_admin_dashboard_index'));         }     }      return array(         'formula' => $formula,         'form' => $form->createview()     ); } 

i able results want in form event subscriber. subscriber looks this:

class addpercentfieldsubscriber implements eventsubscriberinterface {     public static function getsubscribedevents()     {         // tells dispatcher want listen on form.pre_set_data         // event , presetdata method should called.         return array(formevents::pre_set_data => 'presetdata');     }      public function presetdata(formevent $event)     {         $data = $event->getdata();         $form = $event->getform();          // if it's not new formula, want show percentage fields.         if ($data) {             $form->add('percentage', 'text', array(                     'label' => $data->getcolor()->getcode(),                 ));         }     } } 

i've made guesses entity looks like, think want, like:

formulaaddedittype

    public function buildform(formbuilderinterface $builder, array $options) {      $entity=$builder->getdata();     $colors=$entity->getcolors());      $builder     ->add('code', null, array(         'label' => 'code'         ))     ->add('name', null, array(         'label' => 'name'         ));      $colors->map(function ($color) use ($builder) {         $builder->add($color->getname()             , null,              array(                 'label' => $color->getname()                 )             )     }); }